Covering for boilers, pipes, and the like



E. SPICER.

COVERING FOR BOILERS, PIPES, AND THE LIKE. APPLICATION FILED NOV. 11,1920.

Patented Nov. 21, 1922 HBHVEWTR hump-6mm- Patented Nov. El, 1922.

UNHTEE EDWARD SPIOIEE, OF VJKNCOUVER, BRZTISH COLUMBIA, C/lE-TADA.

COVERING EOE BOILEES, PIFES, AND LIKE,

Application filed November 11, 1920. IE0, LQBAZO.

To all whom it may concern Be it known that I, EDWARD Semen, a subjectof the King of Great Britain, and a resident of the city of Vancouver,in the Province of British Columbia, Canada, have invented certain newand useful Improvements in Coverings for Boilers, Pipes, and the like,of which the following is a specification.

My invention relates to improvements in covering for boilers or otheranalogous purposes, and the object of my invention is to devise a meanswhereby the asbestos covering usually employed may be easily applied andthe use of which prevents heat from the boiler passing through to theout side of the covering or to the metal lining which may be used tocover the asbestos so that the outer surface of the cover is maintainedat all times cool,

I attain this object by the means illustrated in the accompanyingdrawings in which- Fig. 1 is an outside elevation showing the boilercovered.

Fig. 2 is an outside elevation with the front part of the outer liningcut away.

Fig. 3 is a perspective view of the band.

Fig. 4 is a fragmentary view of a modification of the invention.

Similar figures of reference indicate similar parts throughout theseveral views.

In covering boilers according to the present invention metal bands,indicated by the numeral 1, are employed and in hot water boilers suchas is shown in the drawings three such bands are preferably employed,one near the upper end of the boiler, one about the midheight, and onenear the lower end and these bands are provided with inwardly turnedmembers 2 of triangular shape, these members being formed out of theband itself by making two outs along the edges of the band at thedesignated positions and then bending inwardly the cut portion to extendat right angles to the inner periphery of the band, the inner points ofthe members being sharp on acount of their triangular shape. There aretwo series of members 2 in each band, one along the upper edge and onealong the lower, and the bands are each divided, as at 3, the dividedends being turned inwardly at right angles and provided with holesthrough which a bolt 4; may be passed '0 draw the ends of he bandtogether, a hole 5 being also formed in toe band so that a screwdriver rother similar tool may be passed through to hold the head of the boltfrom turning. When the bands are place, sheets asbestos, indicated bythe or numerals 6, Y, 8 and 9 are placed arour l boiler 10, the e ds ofwhich sheets it i nin the bands 1 and rest on the members 2, and thesesheets are then enclosed within sheet metal covers 11 and 12 havingdivided ends 13 and 14, one end, 13, being doubled over on itself toform agroove 15 adapted to receive the opposite end 14, and the coversare provided with opposed lugs 16 so that they 'may be drawn togetherand secured by the bolts 17.

It will thus be seen that there is then a space 18 left between theasbestos sheets and the metal covers which constitutes an air space sothat the heat does not pass to the covers from the asbestos, nor does itpass to the covers from the bands since these are held clear of theboiler by the members 2, and as the members 2 themselves bear on theboiler only at their sharp pointed ends, the heat cannot travel alongthe members to the bands, and thus the outside covers are alwaysmaintained cool.

The upper end of the boiler may be covered with any suitable form ofcover, such as indicated at 19 in Fig. 2.

While I have described and illustrated the carrying out of the inventionby the means of the bands 1 it may be stated that instead of theseseparate bands a piece of expanded metal or wire mesh, in one or moresections to suit the length of the boiler, may be used, a fragment ofsuch metal being shown in a and indicated by the numeral 20, and whichmetal is provided on its inner face with pointeo members 21 similar tothe members 2 already described. In this case the metal sheet is wrappedaround the boiler with the pointed members resting on the shell and theasbestos is then plastered on the metal to cover the same to a suitable.thickness. As the asbestos covering does not then bear on the boiler theheat does not pass through to the outside of the covering to beappreciably felt, nor does it heat the metal unduly, since only thesharp point of each member 21 touches the shell,

thus preventing the pointed members, and consequently the metal 20, frombecoming unduly hot.

What I claim as my invention is 1. The combination of a boiler, a seriesof spaced bands surrounding the same, upper and lower sets ofprojections extending inwardly from each band into engagement with theboiler to space the body of the band 'heretroin, said projections beingdisposed inwardly of the upper and lower edges of the band, a sheet ofnon-conducting material enveloping the boiler between each pair of bandswith the ends of the sheet confined beneath opposing edges of the bands,and a metallic covering inclosing the boiler and non-conducting materialand spaced from the latter by engagement with said bands.

2. The combination of a boiler, a series of spaced metallic bandssurrounding the same,

projections extending inwardly from each band into engagement with theboiler to space the body of the band thereform, said projections beingdisposed inwardly of the upper and lower edges or the band, andnon-conducting material enveloping the boil er between the bands andheld in place by engagement beneath the edges of the latter.

8. As a new article of manufacture, a retaining band for non-conductingboiler coverings comprising an annular body provided with pairs ofincisions extending inwardly from the upper and lower edges of the band,the material between the incisions of each pair being bent inwardly toprovide upper and lower sets of boiler engaging prongs disposed inwardlyof the upper and lower edges of the bands.

Dated at Vancouver, B. (1, this 1st day of November, 1920.

EDWARD SPICER.

